I took Angel eyes the other day - she's about 10/11 weeks and weighed 1.5 pounds. At 14 weeks, Flutter weighed exactly 2 pounds.

Both are a little on the thin side because they are picky eaters... unless I put out wet food -- then they eat til their bellies fill up like a balloon! Both are completely healthy and active.

I wouldn't sweat size too much. At the same age, Abby was TINY, and her sibling Harry was HUGE. I'd say he was almost twice her size. As long as he's proportionate, I wouldn't worry.